Thread guide device on a shuttle



July 29, 1952 E. 'HONEGGER Y 2, 9

THREAD GUIDEDEVICE-ON A SHUTTLE Filed Jan. 13, 1950 Fix! ' ATTORNEYS-Patented July 29;, 1952 UNIT D STATES PAT ENT o FicE,

THREAD GUIDE DEVICE ON A SHUTTLE Ernst Honegger, Hinwil, SwitzerlandApplication January 13, 1950, Serial No. 158,736

1 Claim. 1

This invention relates to a threading block for a weavers shuttle, thebody of which is provided with a. channel that leads from the bobbinchamber of the shuttle to the outlet for the thread and said block has aU-shaped part with a guide for the thread being placed between theflanges of said U-shaped part.

The present threading block is characterized in that its thread guide isspirally wound, extended and is positioned so that the thread beingdrawn off from a full bobbin which is lodged in the bobbin chamber ofthe shuttle automatically moves into the guide without any manual help,and remains in said guide when the loom is put into operation.

The accompanying drawing shows an embodiment of the invention, by way ofexample, in which Fig. 1 is a top plan view of the present threadingblock;

Fig. 2 is a side elevation of the block as viewed from the left of Fig.1;

Fig. 3 is a side elevation of the forepart of a shuttle with an upwardlyopen groove and an incorporated threading block as it is placed into thebox of an automatic loom, with one bobbin filed;

Fig. 4 is a top view of Fig. 3.

The forepart of the shuttle body 2 is provided with a groove I which isopen at the top and is formed with a channel 4 that leads from thebobbin chamber to the outlet 3 for the thread and into which a sheetmetal threading block is positioned.

The threading block is for shuttles with an upwardly open groove and hasa part 5 that is U- shaped in cross section, both flanges 6 and 1 ofwhich have a hole 8 each for receiving a head screw 9 that serves forattaching the block to the shuttle. The head screw 9 is set through abore l0 (Fig. 4) that crosses the channel 4. Bore In is enlarged at bothends for the countersunk disposition of the head of the head screw andof the nut. As soon as the device is set in the respective enlargementof channel 4, the stay of the U-shaped part 5 will lie on the bottom ofsaid enlargement, so that the thread to be threaded r: can be introducedfrom outside between the two chamber, is bent outwardly to form anL-shaped leg provided by base l2 that lies parallel to the stay of the-U-shaped part 5, and a flange i3, which extends downwardly and liesparallel to the legs 6 and I being joined to said base I 2. Base l2 hason its outer end, that is turned away from the spiral-shaped guide II, ahook I4 which is bent inwardly and downwardly to the extension of thespace between the two flanges 6 and 1.

The thread end that is drawn off from the bobbin which lies in thebobbin chamber is automatically threaded when the loom is set to workand no manual operation is needed. After the bobbin that is lodged inthe shuttle has become idle, said bobbin is automatically interchangedwith a new bobbin according to known procedure. The free thread end ofthe full bobbin is secured to the frame of the loom. The first weft withthe full bobbin moves to the left of Figs. 3 and 4, so that thedrawn-off thread becomes taut and is caused to lie in the spiral-shapedguide H as well as in the hook l4. Now the first weft is effectuated tothe right, whereby the thread, that is guided along edge l5 of the baseI2 and the joined edge [6 of the flange i3 and is led to an eye ll (Fig.3) disposed on the free edge of the latter and is simultaneously laidinto a slot [8 in flange i.

The above described threading block can be made of steel-sheet which ishardened after it has been worked and formed and is finally subjected toa surface treatment.

Tests made with a shuttle provided with the described threading blockshows that a central thread guide is obtained with the spiral extendedguide I i. Said central thread guiding eliminates the formation of loopsand their fastening on the thread guide part such as occurs in otherwell known thread guide devices if the thread was not taut, so that bythis invention'no interruptions will occur which are due to theformation of loop when the loom is in service.

Having now finally described and explained my said invention and in whatmanner the same is to be performed, I declare that what I claim is:

A one-piece threading block formed of sheet material for use in shuttleshaving a bobbin chamber and side thread delivery opening comprising aU-shaped portion formed by a bottom from which extend a pair of spacedupwardly extending parallel side walls providing a, longitudinallyextending thread passage, a spiral guide extending from one of saidwalls longitudinally and centrally of said thread passage, a front wallbent from the forward end of said spiral guide carrying wall extendingbetween the lower portion of said walls and against said base formaintaining said walls and base in their spaced relation and forming acentral thread guiding member, an L-shaped leg extending laterally andforwardly from said guide supporting wall, the base of said L-shaped leghaving a guide extending therefrom in line with said thread passage, theend of said second mentioned guide having a hook shaped configuration,the upright'arm of said L-shaped leg being substantially parallel tosaid pair of walls and having a thread guide slot formed in the endthereof and said pair of walls having an opening therethrough adjacenttheir base for receiving a shuttle connecting bolt.

ERNST HONEGGER.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,334,683 Stimpson Mar. 23, 19201,649,618 Shaw Nov. 15, 1927 1,794,871 Sherman", Mar. 3, 1931 1,885,823Hall Nov. 1, 1932 2,333,413 Daudelin et a1. Nov. 2, 1943 2,393,077Villani Jan. 15, 1946

